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Surfactants in your wastewater possibly impacting whole effluent toxicity test
Posted: Friday, November 2, 2012 9:27 PM
Joined: 4/2/2012
Posts: 4

I'd like to connect with anyone that has issue regarding the subject matter.  Our NPDES permit requires the City to use T. gratilla, a sea urchin to test for the whole effluent toxicity test. Performance is best on how the in lab serial diluted wastewater compares with the controls (NOEC) and a significant difference results in a permit violation if it occurs before the dilution for our outfall.  We have gone through a Toxicity reduction evaluation plan documentation and performed the toxicity identification evaluation. All indications may point to anionic and nonanionic surfactant.  You can drop me an email at or call me at 808-768-3253.